Kingston KHX11000D3LLK2

Kingston hardly requires an introduction as a memory manufacturer. As the world's largest memory manufacturer you will find Kingston products available at almost every computer retailer. If a product uses memory then Kingston likely makes such a product. Headquartered in Fountain Valley, California, Kingston has grown from its beginnings with a single product in 1987 to $3.4 Billion in sales last year and an offering of over 2000 memory products. Kingston is by far the world's largest independent memory manufacturer, and it is more than 3 times larger than #2.

Kingston today manufactures memory at four manufacturing locations: US, Malaysia, China, and Taiwan. The four manufacturing plants have more than 35 Surface Mount Technology (SMT) lines for producing virtually every kind of memory available in the world. This includes the DIMMs, SO-DIMMs, and flash memory that are of most interest in the Computer and Digital Imaging markets. Within these product categories, Kingston manufactures a full range of products, from OEM parts to their popular Value RAM series to enthusiast-oriented HyperX products.

While Kingston is one of the first names to pop into mind when anyone mentions memory, it is not the first name most computer enthusiasts might think of when it comes to high-end memory. Yet, Kingston always provides competitive high-end products in their HyperX line, and they are large enough to often be first to market with new memory technology. Today's review of Kingston DDR3-1333+ memory rated at 7-7-7 timings is an example of that.

For memory that is charting new territory the packaging is not really new. You will find the low-latency HyperX DDR3-1333 in the traditional Kingston double kit tray with a clear cover and an adhesive ID label.

The DIMMs themselves are also typical. The only feature that makes them stand out in appearance is the familiar blue heatspreader that identifies this as top-line HyperX memory. Of course the specs begin to tell us that this is the fastest DDR3 we have yet tested with the best timings on the market.

Kingston KHX11000D3LLK2
Memory Specifications
Number of DIMMs & Banks 2 DS
Total Memory 2 GB (2 x 1GB)
Rated Timings 7-7-7-20 at DDR3-1375
Rated Voltage 1.7V (Standard 1.5V)

If the specifications look a little strange, recall that DDR3 is lower voltage, higher speed and slower timings than DDR2. The chart below summarizes some of the differences in the official JEDEC DDR2 and DDR3 specifications.

JEDEC Memory Specifications
Rated Speed 400-800 Mbps 800-1600 Mbps
Vdd/Vddq 1.8V +/- 0.1V 1.5V +/- 0.075V
Internal Banks 4 8
Termination Limited All DQ signals
Topology Conventional T Fly-by
Driver Control OCD Calibration Self Calibration with ZQ
Thermal Sensor No Yes (Optional)

JEDEC specifications are a starting point for enthusiast memory companies. However, since there was never a JEDEC standard for memory faster than DDR-400 then DDR memory running at faster speeds is really overclocked DDR-400. Similarly DDR2 memory faster than DDR2-800 is actually overclocked DDR2-800 since there is currently no official JEDEC spec for DDR2-1066. DDR speeds ran to DDR-400, DDR2 has official specs from 400 to 800, and DDR3 will extend this from 800 to 1600 based on the current JEDEC specification.

The Kingston KHX11000D3LLK2 is the first DDR3 we have tested with a rated 1333 or higher speed. It also offers lower latency than any DDR3 we have seen so far.

Kingston HyperX DDR3-1375 with be available in the 2GB kit we are reviewing here, as well as in a 1GB kit consisting of a matched pair of 512MB DIMMs. Kingston will also sell single 1GB and 512MB DDR3-1375 DIMMs. Kingston will announce this DDR3-1375 low latency memory at Computex on June 5th. As we were finishing this review we asked Kingston when this new DDR3 memory will be available for purchase. They told us distributors have the memory or will be receiving it shortly, and that readers should be able to buy the new low-latency DDR3 on launch day, June 5th.

Pricing for the low-latency DDR3 kits is set by sellers, and it is normally lower than the manufacturer's suggested price. Kingston has set the following MSRP for the new DDR3 low-latency kits:

2GB (2 x 1GB) kit $518
1GB (2 x 512MB) kit $256
Single 1GB DIMM $268
Single 512MB DIMM $134

This HyperX DDR3-1375 7-7-7 memory is Kingston's top-of-the-line product, but Kingston will also be launching DDR3 Value RAM. We don't yet have specifications or pricing for the Value RAM product.

Index Memory Test Configuration


View All Comments

  • goinginstyle - Thursday, May 24, 2007 - link

    How did you arrive at the 1520 DDR3 memory speed? FSB increase from 8x333 or a memory ratio change. Do you have any overclocked DDR2 memory scores on the P965? It would be interesting to compare overclocked DDR2 to DDR3. Reply
  • Wesley Fink - Thursday, May 24, 2007 - link

    You can look back at the Corsair Dominator memory review where we ran benchmarks at the highest overclock we could achieve. THe review is at"> THere are also overclocked test scores that can be compared in any of our more recent DDR2 reviews Reply
  • Wesley Fink - Thursday, May 24, 2007 - link

    From the 1333 memory setting we overclocked to 380x8, or 3.04GHz. At that OC, with a base 1333 memory setting, the memory speed is 1520.

    One reader pointed out that 7x380 is also 2.66, which is our test frequency at other speeds. That is correct and it is an intriguing idea to also run all benchmarks at the 380x7 speed. We'll consider for a comparison in an upcoming review.
  • goinginstyle - Thursday, May 24, 2007 - link


    From the 1333 memory setting we overclocked to 380x8, or 3.04GHz. At that OC, with a base 1333 memory setting, the memory speed is 1520.

    So it is very possible that the improvements in scores came from the increase in cpu speed and not the memory or it is a combination of both? How close can you get to 1333 memory speed at 8x380 so we know how much improvement there is in cpu speed over the increase in memory speed.


    One reader pointed out that 7x380 is also 2.66, which is our test frequency at other speeds. That is correct and it is an intriguing idea to also run all benchmarks at the 380x7 speed. We'll consider for a comparison in an upcoming review.

    That is what has been confusing to me. Why not run at 7x380 to keep the CPU at the same speed so we can see how much performance is gained in running the memory higher. The one flaw is the increase in FSB speed would alter the scores if the app responds to cpu throughput improvements. I would suppose that would be minimal in the game testing but it would throw off the sandra scores. Does high memory speeds at high latencies beat stock memory speeds at low latencies?

    The article yesterday mentioned 1t command rates. Did you try 1t to see what happened with the Kingston memory? You used to report Everest scores and I was wondering if those scores are available or maybe Memtest if you use it. I think it would be interesting to see latency numbers in the article.
  • Wesley Fink - Thursday, May 24, 2007 - link

    Our standard procedure has been to test to the highest available memory setting, in this case 1333, and then overclock as far as we can go using this base memory setting. It is just a fortunate accident that 1520 was top OC here (and it still wasn;t the fastest results - 1500 7-7-7 was faster)which is also 7x333 or the same 2.66 used in the other memory speed tests. It would not likely hit that exact number again in future DDR3 reviews. Reply
  • yuchai - Thursday, May 24, 2007 - link

    the 1520 speed is probably achieved by a 380 x 7 = 2660 configuration, so processor speed remains constant while the RAM runs at 1520 speeds.

    That said I'm surprised at the big improvement from 1333 to 1520, especially compared to the relatively small difference between 1333 and 1066.
  • goinginstyle - Thursday, May 24, 2007 - link


    the 1520 speed is probably achieved by a 380 x 7 = 2660 configuration, so processor speed remains constant while the RAM runs at 1520 speeds.

    If that is the case then how do we know how much the FSB increased the score or how much the memory affected the results. I still think it is important to show overclocked DDR2 if they are going to show overclocked DDR3.
  • Chunga29 - Thursday, May 24, 2007 - link

    I wish that you were correct, but looking at the tables at least on says "8x380" - page 4. So it's not apples to apples. The text never talks about how fast the 1520 RAM speed is, likely because that's partly due to a 14% CPU overclock.

    While we're at it, where are the numbers for P965 with 1333 FSB? We've seen overclocking results on P965 with bus speeds as high as 2000+, so don't give us any excuses about it not being possible. Using ratios, you can come somewhat close to DDR2-800 and DDR2-1066, and if you're throwing in overclocked DDR3 scores anyway.... At least let us see what DDR2 can achieve on P965 with a decent effort. Sure, it's out of official spec, but then DDR2-800 with 3-3-3 timings isn't JEDEC spec either.
  • Wesley Fink - Friday, May 25, 2007 - link

    The 7x380 and 8x380 results are in a comment below and will be added to the OC section in a table.

    As for the P965, it was not designed to run 1333 processors or DDR3 memory, so there is no 1333 CPU raio available or any memory ratio above 1066. While it is true you can run a 25% overclock at 1333 FSB, the memory is also overclocked 25% from whatever ratio you selected. Even if you OC and select to get close to 1333 you will be running different memory straps on the P35 and P65 which definitely impacts results. It is very difficult to fairly compare P965 to P35 at speeds above 1066.

    At 1333 FSB the DDR2 memory is OC'ed from the 1066 base to 1333, and we don't have a single stick of DDR2 that is stable at 1333. An 800 speed base on P965 at 1333 would be DDR2-1000, which should be compared to what on the P35? Try to select OC vlues on your P965 board to see what we are talking about here.

    You are correct that it is is not impossible to come up with something somewhat close in a P965 test, it is just everything on the P965 would be overclocked while P35 would be running in spec. We can always compare an overclcoked P965 to a spec part, but is that more like justification for a P965 purchase than a revealing comparison.

    We will likely run some more P965 tests just to answer questions here, but we will only be including overlap speeds, where comparisons can be fairly made, in future reviews. There are also a multitude of P965 OC results in reviews out there for those that are interested.
  • Zaitsev - Thursday, May 24, 2007 - link

    I noticed this as well. It just seems odd because the jump from 1066->1333 is 267MHz, while 1333->1520 is 187MHz. In Far Cry and Quake 4 that translated into 10.91 and 8 more frames per sec. respectively. Did I miss something in the article or can someone explain why a smaller increase in MHz yielded a larger improvement?

    Oh, I see now that the processor is overclocked.

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